Escobar performed a study to validate a translated version of the Western Ontario and McMaster University index (WOMAC) questionnaire used with Spanish-speaking patient s with hip or knee...

Escobar performed a study to validate a translated version of the
Western Ontario and McMaster University index (WOMAC)
questionnaire used with Spanish-speaking patient s with hip or
knee osteoarthritis. For the 76 women classified with sever hip
pain. The WOMAC mean function score was 70.7 with standard
deviation of 14.6, we wish to know if we may conclude that the
mean function score for a population of similar women subjects
with sever hip pain is less than 75. Let α =0.01